Numerical Simulation Of Wind-induced Vibration Response Of High-rise Fabricated Structure

In recent years, with the rapid development of China's industrialization process, prefabricated structure has been booming development. Prefabricated structure is widely spread because of its rapid construction and energy conservation. Since modern architecture is going bigger and taller, the study of the wind-induced vibration response of prefabricated structure becomes more and more important. Therefore, in order to improve the structure of wind resistant capacity and ensure the safety of structure, wind resistant design is essential. On the premise of the economy, safety and comfort of building, it is very necessary to study the response of high-level fabricated structure under dynamic wind load. For research about wind vibration response of high-rise fabricated structure, numerical simulation is one of very feasible method.Based on a high-level fabricated structure in Jinan, this thesis mainly conducts the study of the wind-induced vibration response for it in along-wind direction. Specific as follows:(1) Firstly, according to research of scholars both at home and abroad, the background and significance of high-level fabricated structure are introduced. This paper expounds the development of fabricated structure, research situation and the research situation of the wind vibration at home and abroad.(2) After introducing the basic characteristics of wind loads and related concepts, the thesis describes the role of wind on structures, characteristics of fluctuating wind and random vibration theory.(3) This paper combs the basic theoretical knowledge of wind field. Analyses were conducted on wind speed, wind pressure and wind load simulation process. The simplification of random wind field and the randomness of wind speed are discussed. Harmony superposition method is used to simulate the wind velocity. In the first chapter, the Davenport wind speed spectrum of several representative wind spectra are selected. Combined with the engineering, the wind load on the point of different heights is programmed in MATLAB software. The wind speed at different heights of the project is simulated, and the wind speed data of MATLAB simulation is transformed. It is verified that the simulated wind spectrum and the target spectrum are almost the same. It shows that the simulated wind speed is more reliable, and it is feasible to simulate the wind vibration of the structure.(4) The calculation of wind-induced vibration response of high-level fabricated structure in this chapter firstly. Based on the practical engineering in Jinan, a reasonable ABAQUS finite element model is established to simulate the prefabricated shear wall structure. The simulated wind loads of the third chapter are applied to the modal analysis and time-history analysis of wind vibration response of model. And the results are compared with the design results. In order to study the wind-induced vibration of fabricated structure, the different response of the cast-in-place structure and the fabricated structure is analyzed by changing the parameters.(5) Wind-induced vibration response for high-level fabricated structure are summarized and prospected.